FAQ

Do you only do off-grid systems?

We have a lot of customers that are still connected to the grid that just want to save on power costs while also having a system that will keep them running during a power cut, even at night. Basically our systems store excess solar power in batteries rather that selling it to the power company for 7c and then buying it back from them at night for 30c. Selling to to power companies also comes with a lot of complications and risk. For example they could stop paying you for the power you generate, or even worse, charge you to export power like what is now happening in Australia.

Do you install?

No. We are a wholesaler of solar equipment and are here to help you take out the middleman to save on costs. But our smaller kits are designed so that anyone can install them. If you aren't confident around crimping lugs and ferrules onto wires or attaching MC4 ends to the solar cable, we can do this for you before we send you the kit. We just need measurements of where you will set it up. After that, everything should be pretty straight forward and we can share a video showing you what wires go where. But if you still don't trust yourself, we have a list of people around the country that will be able to help you. For our larger kits you are welcome to do some of the work yourself if you are capable. But you need to get your sparky involved especially for the prescribed work. But if you want someone to install everything for you, we can put you in touch will local installers we know.

Why don't you have 12V batteries?

When it comes to electricity it is more efficient to transfer it at a higher voltage. This is because as you increase amps (remember power = volts x amps) you lose energy in your wire. Your wire can also heat up too with high amps and hence you need thicker copper wire to keep things safe and not lose too much in terms of energy. So why do we only offer 48v and not higher? It is about safety. If the voltage is too high it starts getting dangerous for you to handle. But what about my gear that runs on 12v? Easy. We have 30a DC-DC step down converters that will take the 24v or 48v down to 12v to run anything that needs 12v.

Where do you ship to?

We ship nationwide. We usually courier the smaller kits. For the larger kits we send via Mainfreight to your local Mainfreight depot to help you save on costs. If you want it delivered to your site we can organise this too.

Where are you based?

We are based in Stratford, Taranaki. If you would like to come and have a look at the gear please contact us and arrange a visit.

Why Lithium and not Lead?

LiFePO4 (Lithium Iron Phosphate) batteries have a life span 10 times longer than that of traditional lead acid batteries. Due to our battery's BMS (Battery Management System) they have over-voltage and over-current protection, short circuit protection, low-voltage protection, handle far wider variations in temperature, are one quarter of the weight and have a much lower resistance (and consequently recharge at a faster rate). They are also sealed and maintenance free. The list goes on. We understand they are more expensive than lead batteries, but at Roar Power we want to provide gear that is going to last a very long time and be maintenance free. Read more about the benefits of LFP batteries over Lead here.

What size kit do I need?

Usually a campervan will need one to two panels depending on how often you use it. For a small bach, where you just need to run some lights, probably just one panel. If you need to run a small fridge you are looking at least two. For a big fridge and other gear, then most likely a four panel system. For a tiny home, you are looking at the eight panel system most likely. But it is really hard to generalise. For comprehensive advice, please send us an email and we can help you pick the right amount of solar panels and batteries you will need.

How do I purchase a kit?

We don't allow people to buy directly online as we want to make sure the kit you choose is what you need and make sure we have all the gear in stock for you. If you wish you buy a kit from us, reach out to us using chat, email or phone. After we discuss options we will email you a quote with all the gear and once you are happy we will convert it to an invoice for you.

Why are your kits cheaper? What is the catch?

No catch. We import all our gear directly from the manufacturer to help you save on cost. If you buy through an installer then your installer is probably buying from a wholesaler and then putting their markup on top.

More panels or more batteries?

We suggest more panels. Panels will still produce power on a cloudy day (40-60%) and even on rainy days (10-20%). On the other hand batteries are expensive and don't produce any power and only store it. No point having lots of storage you can't fill. We recommend having a battery with enough capacity to last you a full day of power use and as many panels as you can budget for.

Will I need a generator if I'm off-grid?

If it is your home and you are living there, yes. We highly recommend having a generator backup. Batteries are expensive and if you want to try and have power 100% of the time without a generator it gets pricey. Getting that last 2% might cost you double the cost of a system that covers you 98% of the time.

How can I get my generator to start automatically when batteries are low?

Our Growatt inverters have a dry contact port built in. You can use this to trigger a two wire hot start generator to start automatically when batteries are getting low. You can program this point with the inverter. You can also program when to turn the generator off again.

Can I ground mount my panels?

Yes. We have ground mounting equipment as an optional extra. Reach out to us for a quote.

My roof is flat. How can I tilt my panels towards to sun?

We have optional tilt legs you can use as part of the mounting equipment.

Which way should my panels face and at what pitch?

North is best. As for pitch, you want to pitch your panels for the winter sun. This means 40 degrees or so. But often that isn't practical as you don't want your panels to become a sail and catch too much wind. Panels will still work well at lower angles. One of our test rigs is at 19 degrees pitch and produces more power than the panels rating in winter. So don't get too concerned.